<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-04 -063 20:40:00.000"
URSICode="SAA0K"
StationName="SaoLuis"
GeoLatitude="-2.6"
GeoLongitude="315.8"
Source="Ionosonde"
SourceType="DPS-4"
ScalerType="auto">
<SystemInfo UMLStationID="903">
<FrequencyStepping StartFrequency="1.0" StopFrequency="18.0">
<LinearStepping Step="0.05" Units="MHz" />
</FrequencyStepping>
<RangeStepping StartRange="80.0" StopRange="1360.0" >
<LinearStepping Step="5.0" Units="km" />
</RangeStepping>
<AutoScaler Name="Artist5" Version="500200" ArtistFlags="2 2 0 0 0 0 0 0 0 22 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 70% PACIFIC flags: Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, Unidentified traces above foF2</Comments>
<ContactPerson>
<Name>Dr. Mangalathayil Ali Abdu</Name>
<Affiliation>INPE, Division of Aeronomy</Affiliation>
<Address>Av dos Astronautas, 1.758 Jd. Granja - CEP: 12227-010 Sao Jose dos Campos - SP Brasil</Address>
<Email>maabdu@dae.inpe.br</Email>
</ContactPerson>
<StartTime Format="yyyy.MM.dd (DDD) HH:mm:ss" TimeZone="Coordinated Universal Time" >
2026.03.04 (063) 20:40:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.16" Model="IGRF 3.0" Altitude="300"/>
<DeclinationAngle Val="-19.74" Model="IGRF 3.0" Altitude="300"/>
<SunSpotNumber Val="-1.0" Status="predicted"/>
</SolarTerrestrialData>
<DigisondePreface Format="FF">
FF202606303042040009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="29" >
<URSI ID="00" Val="11.050" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.539" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="28.055" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.650" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="4.550" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.000" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.450" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="270.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="270.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="34" Val="120.000" Name="h`Es" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="110.000" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="20.000" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.800" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.550" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="510.909" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Custom Name="dlt foF2" Val="0.000" Description="Adjustment to the scaled foF2 during profile inversion" Units="MHz" />
<Modeled Name="foEp" Val="1.758" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.000" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.000" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="378.726" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="290.728" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.580" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="2.650" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="123.030" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="41.711" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="62.670" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="141.420" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.390" Name="B1" QL="/" DL="/" />
<URSI ID="32" Val="4.000" Name="fbEs" Units="MHz" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="142">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
4.0 4.05 4.1 4.15 4.2 4.25 4.3 4.35 4.4 4.45 4.5 4.55 4.6 4.65 4.7 4.75 4.8 4.85 4.9 4.95 5.0 5.05 5.1 5.15 5.2 5.25 5.3 5.35 5.4 5.45 5.5 5.55 5.6 5.65 5.7 5.75 5.8 5.85 5.9 5.95 6.0 6.05 6.1 6.15 6.2 6.25 6.3 6.35 6.4 6.45 6.5 6.55 6.6 6.65 6.7 6.75 6.8 6.85 6.9 6.95 7.0 7.05 7.1 7.15 7.2 7.25 7.3 7.35 7.4 7.45 7.5 7.55 7.6 7.65 7.7 7.75 7.8 7.85 7.9 7.95 8.0 8.05 8.1 8.15 8.2 8.25 8.3 8.35 8.4 8.45 8.5 8.55 8.6 8.65 8.7 8.75 8.8 8.85 8.9 8.95 9.0 9.05 9.1 9.15 9.2 9.25 9.3 9.35 9.4 9.45 9.5 9.55 9.6 9.65 9.7 9.75 9.8 9.85 9.9 9.95 10.0 10.05 10.1 10.15 10.2 10.25 10.3 10.35 10.4 10.45 10.5 10.55 10.6 10.65 10.7 10.75 10.8 10.85 10.9 10.95 11.0 11.05
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
270.000 275.000 276.667 278.333 280.000 275.000 275.000 280.000 280.000 281.667 283.333 285.000 285.000 287.500 290.000 290.000 290.000 290.000 295.000 295.000 295.000 295.000 295.000 295.000 300.000 300.000 305.000 310.000 305.000 305.000 306.667 308.333 310.000 315.000 315.000 315.000 320.000 320.000 320.000 322.500 325.000 330.000 330.000 330.000 330.000 335.000 335.000 335.000 340.000 340.000 340.000 345.000 345.000 350.000 350.000 350.000 355.000 356.667 358.333 360.000 361.667 363.333 365.000 365.000 365.000 370.000 370.000 370.000 375.000 377.500 380.000 380.000 385.000 385.000 390.000 390.000 395.000 395.000 395.000 400.000 402.500 405.000 405.000 407.500 410.000 412.500 415.000 415.000 415.000 420.000 420.000 420.000 425.000 430.000 427.500 425.000 430.000 435.000 435.000 435.000 440.000 435.000 440.000 445.000 450.000 450.000 450.000 452.500 455.000 455.000 460.000 460.000 462.500 465.000 467.500 470.000 472.500 475.000 477.500 480.000 480.000 480.000 482.500 485.000 487.500 490.000 495.000 498.182 501.364 504.545 507.727 510.909 514.091 518.710 523.758 529.298 535.406 542.174 549.714 558.167 567.709 578.566
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 48 0 0 51 57 57 60 60 0 0 63 60 0 57 57 60 63 57 63 0 54 0 54 63 63 0 48 63 63 0 0 66 69 75 72 72 72 72 0 75 63 0 57 75 69 72 75 69 75 75 72 75 66 69 75 66 0 0 0 0 0 66 72 72 69 0 69 72 0 72 75 69 72 63 66 54 66 72 60 0 57 66 0 63 0 54 66 69 63 66 63 66 57 63 69 0 69 72 69 69 72 63 69 60 66 72 60 69 63 60 63 0 63 0 0 0 0 0 60 63 60 54 60 0 60 57 57 57 51 57 57 57 57 57 54 54 51 0 0 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -1.171875 -1.171875 -0.390625 -0.390625 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 1.171875 -1.171875 -0.390625 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -0.390625 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -0.390625 -0.390625 -1.171875 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -2.734375 -1.171875 -2.734375 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -0.390625 -0.390625 -0.390625 -1.171875 -0.390625 -0.390625 -0.390625 -1.171875 -2.734375 1.171875 1.171875 -1.953125
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="39">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.65 2.7 2.75 2.8 2.85 2.9 2.95 3.0 3.05 3.1 3.15 3.2 3.25 3.3 3.35 3.4 3.45 3.5 3.55 3.6 3.65 3.7 3.75 3.8 3.85 3.9 3.95 4.0 4.05 4.1 4.15 4.2 4.25 4.3 4.35 4.4 4.45 4.5 4.55
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
120.000 118.333 116.667 115.000 113.333 111.667 110.000 110.000 110.000 110.000 110.000 110.000 115.000 115.000 117.500 120.000 120.000 120.000 120.000 120.000 125.000 121.250 117.500 113.750 110.000 110.000 113.333 116.667 120.000 125.000 130.000 125.000 120.000 119.000 118.000 117.000 116.000 115.000 110.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 0 0 0 0 0 66 0 0 0 72 72 69 69 0 54 0 54 0 54 54 0 0 0 66 0 0 0 48 51 51 0 57 0 0 0 0 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 2.734375 -0.390625 -0.390625 2.734375 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 -0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 -0.390625 -0.390625 -0.390625 0.390625 1.171875 0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 -0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="188">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.835 90.0 95.0 100.0 105.0 110.0 115.0 119.598 120.0 125.0 129.196 130.0 135.0 138.794 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 378.726 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.214 1.177 1.523 1.701 1.758 1.721 1.62 1.62 1.62 1.62 1.632 1.703 1.758 1.799 1.955 2.1 2.243 2.389 2.539 2.696 2.86 3.033 3.216 3.407 3.607 3.816 4.031 4.251 4.476 4.702 4.93 5.158 5.385 5.611 5.836 6.058 6.279 6.498 6.716 6.932 7.146 7.359 7.572 7.783 7.993 8.204 8.413 8.623 8.833 9.042 9.252 9.461 9.67 9.878 10.083 10.285 10.479 10.662 10.823 10.952 11.031 11.05 11.05 11.039 11.016 10.981 10.935 10.877 10.81 10.733 10.648 10.554 10.453 10.346 10.232 10.113 9.988 9.859 9.726 9.59 9.451 9.309 9.164 9.018 8.871 8.722 8.572 8.422 8.272 8.121 7.971 7.821 7.671 7.523 7.375 7.229 7.084 6.94 6.797 6.656 6.517 6.38 6.244 6.11 5.978 5.848 5.72 5.594 5.471 5.349 5.229 5.112 4.996 4.883 4.772 4.662 4.555 4.45 4.348 4.247 4.148 4.051 3.957 3.864 3.773 3.684 3.597 3.512 3.429 3.347 3.268 3.19 3.114 3.039 2.966 2.895 2.826 2.758 2.691 2.627 2.563 2.501 2.441 2.382 2.324 2.268 2.213 2.159 2.107 2.056 2.006 1.957 1.909 1.863 1.817 1.773 1.73 1.687 1.646 1.606 1.567 1.528 1.491 1.455 1.419 1.384 1.35 1.317 1.285 1.254 1.223 1.193 1.164 1.135 1.107 1.08 1.054 1.028 1.002 0.978 0.954 0.93 0.908 0.885 0.863 0.842 0.822

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.758" PeakHeight="110.0" Num="3" Error="0.0">
-28.659 10.574 -2.08
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.758" EndFrequency="11.05" PeakHeight="378.726" Num="5" zHalfNm="290.728" Error="3.094">
-211.382 -46.836 26.345 -12.106 4.047
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="28.794" Depth="0.138"/>
<TopsideChapman PeakHeight="378.726" PeakDensity="1514919.4" PeakScaleHeight="62.67" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
